Catch a glimpse of the Downtown Line 3 (DTL3) before it goes live at an open house event today.

From 10am to 6pm, people can check out all 16 new stations and take free train rides along the 21km line ahead of its official opening on Oct 21. Entry is free and no tickets are required.

Other highlights include a guided tour of Civil Defence shelters conducted by the Singapore Civil Defence Force at the Geylang Bahru, Bedok Reservoir and Tampines West stations.

Visitors can also buy a special miniature train at two pop-up stores at Fort Canning and Tampines stations, set up by the Land Transport Authority's (LTA) Knackstop souvenir shop. The self-assembled train model comprises 248 pieces and is being launched to commemorate the completion of the three-stage line.

Net proceeds from the sales of the train set and other items from the pop-up stores will be channelled to the LTA Cares Fund, which supports the transport needs of the disadvantaged.

A storybook targeted at pre-schoolers aged between four and six, titled Mindy's First MRT Adventure, will also make its debut.

Children can collect a specially designed bookmark at the open house and use it to redeem a copy of the book at the following three DTL3 stations: Fort Canning, MacPherson and Expo.

There are celebrity performances and games, while local enthusiast group SGTrains will run a booth at the Fort Canning station featuring a train driving simulator that visitors can try out.